A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_EXECUTIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeExecutionsConnection().
GOOGLE_CLOUD_CPP_JOBS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeJobsConnection().
GOOGLE_CLOUD_CPP_REVISIONS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeRevisionsConnection().
GOOGLE_CLOUD_CPP_RUN_SERVICES_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeServicesConnection().
GOOGLE_CLOUD_CPP_TASKS_ENDPOINT=... overrides the EndpointOption (which defaults to "run.googleapis.com") used by MakeTasksConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::TracingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["This page lists available versions of the C++ library, ranging from version 2.11.0 to the latest release candidate 2.37.0-rc, with each version linking to its respective run environment documentation."],["Several environment variables can be set to override default behaviors, such as `GOOGLE_CLOUD_CPP_EXECUTIONS_ENDPOINT`, `GOOGLE_CLOUD_CPP_JOBS_ENDPOINT`, `GOOGLE_CLOUD_CPP_REVISIONS_ENDPOINT`, `GOOGLE_CLOUD_CPP_RUN_SERVICES_ENDPOINT`, and `GOOGLE_CLOUD_CPP_TASKS_ENDPOINT` to change the endpoint used for different connections."],["The `GOOGLE_CLOUD_CPP_ENABLE_TRACING` environment variable allows for enabling gRPC call tracing, and it is suggested to also use `GOOGLE_CLOUD_CPP_ENABLE_CLOG` to produce console output if no logging backend has been configured."],["Logging features can be turned on by using the environment variable `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, which enables the library's logging infrastructure, and the `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` variable can modify gRPC tracing behavior."],["The `GOOGLE_CLOUD_PROJECT` variable is for examples and tests, and does not impact the library directly."]]],[]]
